Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The StorageManager interface of the Storage API provides an interface for managing persistence permissions and estimating available storage. You can get a reference to this interface using either or

Note: This feature is available in Web Workers

Instance methods


Returns a Promise that resolves to an object containing usage and quota numbers for your origin.


Used to obtain a reference to a FileSystemDirectoryHandle object allowing access to a directory and its contents, stored in the origin private file system. Returns a Promise that fulfills with a FileSystemDirectoryHandle object.


Returns a Promise that resolves to true if the user agent is able to persist your site's storage.


Returns a Promise that resolves to true if persistence has already been granted for your site's storage.


Storage Standard
# storagemanager

Browser compatibility

BCD tables only load in the browser